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Method and device for operating an electric drive

A driving device and electric technology, which is applied to electric devices, electric vehicles, control devices, etc., can solve the problems of heating the end of the converter and the thermal damage of the end of the converter.

Active Publication Date: 2014-10-29
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, when the low-voltage on-board power grid is interrupted, the same is true for the water cycle. The consequence of this is that the coil of the drive motor and the final pole of the converter may be heated rapidly and strongly.
In particular, the final pole of the converter can be thermally destroyed very quickly if the maximum permissible temperature is exceeded

Method used

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  • Method and device for operating an electric drive
  • Method and device for operating an electric drive
  • Method and device for operating an electric drive

Examples

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Embodiment Construction

[0021] exist figure 1 A drive device 1 for driving an electrically driven motor vehicle is schematically shown in . The drive device comprises a drive motor 2 which is connected to a drive shaft 3 . The high-voltage battery supplies drive motor 2 with the energy necessary for driving. The parking lock 5 can be coupled to the drive shaft 3 in order to secure it. Furthermore, the drive motor 2 has a motor cooling device 6 for cooling the coils of the drive motor 2 , which is driven by a low-voltage vehicle electrical system (not shown in detail). Furthermore, a short-circuit device 7 is provided, by means of which the coils of the electric motor 2 can be short-circuited. The short-circuit device 7 has a temperature sensor by means of which the most critical temperatures within the short-circuit device 7 can be measured. The control device 9 receives the signal of the temperature sensor 8 and a readiness signal 10 from the vehicle control unit, which indicates a limited readi...

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PUM

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Abstract

The method involves directly coupling a drive electromotor (2) with a drive axle (3), where the drive electromotor is driven by a high volt onboard network (4). A park locking device (5) is locked in a park condition by using the drive axle, and a cooling device (6) is provided with a temperature sensor (8) for detecting operating temperature of the cooling device. A cooling unit cools the drive electromotor and the cooling device. The temperature sensor is constantly checked, and a short circuit device (7) is deactivated if the temperature sensor detects an incorrect high temperature. Independent claims are also included for the following: (1) a device for performing a method for operating an electrical drive device for a motor car during towing, comprising a temperature sensor (2) an electrical drive device for a motor car, comprising a park locking device.

Description

technical field [0001] The invention relates to a method for operating an electric drive of a motor vehicle during towing. Furthermore, the invention relates to a device for carrying out the method and an electric drive. Background technique [0002] In electric vehicles, the drive motor is usually coupled directly and clutch-free to the vehicle drive shaft. When such a vehicle is to be towed, for example because the low-voltage on-board electrical system fails, the high-voltage battery of the drive motor is drained or there are other faults, this leads to the unavoidable co-rotation of the drive motor during the drive process. This leads, in particular when permanently excited electric motors are used, to generatively generated voltages which are generally higher than 60 V and thus violate the relevant high-voltage safety regulations. This means that the working state must become safe. [0003] In the normal driving state, various tests are carried out, such as insulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00B60R16/02
CPCB60L3/0061Y02T10/642B60L2240/425Y02T10/64
Inventor R·格里斯巴赫R·瓦格纳
Owner BAYERISCHE MOTOREN WERKE AG